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ST20C2 Datasheet(PDF) 149 Page - STMicroelectronics

Part # ST20C2
Description  Instruction Set Reference Manual
PDF  212 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST20C2 Datasheet(HTML) 149 Page - STMicroelectronics

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roundsn
149/212
®
roundsn
round single length floating point number
Code: 26 FD
Description: Round an unpacked result of a floating point oper ation into Areg.
Rounding is performed in round-to-nearest mode, as defined b y IEEE-754. Initially the
post-normalised guardword, fractionword and exponent are in Areg, Breg, and Creg,
as left by the instruction
postnormsn. This instruction is only intended to be used in
the single length rounding code sequence immediately after
postnormsn.
Definition:
Areg
′← rounded and packed fp number
Breg
′← undefined
Creg
′← undefined
Error signals:
none
Comments:
Secondary instruction.
See also:
postnormsn unpacksn



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